1、前言 这几天刷leetcode经常碰到DFS BFS的问题,之前一直也是模棱两可,凭着感觉做,是需要总结一下了。 深度优先搜索(缩写DFS)是一种在开发爬虫早期使用较多的方法。属于图算法的一种,也是对一个连通图进行遍历的算法。其思想是:从一个顶点vv开始,沿着一条路线一直走到底,如果发现不能到达目标,那就返回到走不通...
题目 最近在LeetCode上看到这么一道链接题目 给定一个由正整数组成的数组C和一个目标数字T,查找C中所有的唯一组合,其中候选数字总和为T。 从C中抽出的数字...
Explanation: 递归~ Implement 最开始试图用map标记每个单词中字符出现的次数,然后与S比较,但是发现这样的话会忽略字符出现的顺序,心塞 explanation: https...[leetcode]792. Number of Matching Subsequences Analysis 明天就是除夕啦—— [每天刷题并不难0.0] Given LintCode 466链表节点计数 思路 遍历访问数个数...
search search用于在序列A中查找满足条件的序列B,返回序列B在序列A中第一次出现的位置。 输出结果:...leetcode经典题目:word-search 题目: 思路:先循环,然后挨个DFS+回溯,这里的回溯使用的是异或运算符,因为ascii码是0-127...【Leetcode】79. Word Search(DFS) Given a 2D board and a word, find if...
这里的过程可参考Longest Substring Without Repeating Characters - Leetcode 3 - Python 代码如下: 代码语言:Swift AI代码解释 classSolution{funclengthOfLongestSubstring(_s:String)->Int{ifs.length==0{return0}letcharList=Array(s)varlist:[Character]=[]varleft:Int=0varmaxLength:Int=0forrightin0..<char...
https://leetcode.com/problems/maximum-depth-of-binary-tree/ https://leetcode.com/problems/maximum-depth-of-binary-tree/discuss/34207/my-code-of-c-depth-first-search-and-breadth-first-search LeetCode All in One 题目讲解汇总(持续更新中...) ...
Binary Search Tree Insertion The insertion procedure is quite similar to searching. We start at the root and recursively go down the tree searching for a location in a BST to insert a new node. If the element to be inserted is already in the tree, we are done (we do not insert duplica...
Given a n-ary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value...
The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples). ...
* temp: random leetcode solutions @@ -323,4 +325,47 @@ public boolean isSameTree(TreeNode p, TreeNode q) { return p.val == q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right); } /** * <h4><a href="https://leetcode.com/problems/minimum-depth-of-binar...